I'm afraid I'm going to have to disappoint you. The "Welsh Sheep Shagger" is a myth. Not that sheep weren't being shagged, mind you, and not that it's natural to assume the perpetrators were Welsh, but it turns out that it was being done by Englishmen nipping over the border for some real sex. The resulting bastards were forcibly evicted from Wales. If proof were needed, I need only say one word - Brummies.